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Dr Gladymar Perez Chacon

Dr Gladymar Perez Chacon

Epidemiologist

MBBS, DTM&H, PhD

Medicine & Health
The Kirby Institute

I am a medically trained public health scientist interested in the epidemiology of vaccine-preventable diseases. My PhD research examined the immunogenicity, reactogenicity, and IgE-mediated immune responses of a mixed whole-cell and acellular pertussis vaccine schedule in Australian infants. Based in Perth, I contributed to studies on maternal RSV and pertussis vaccines, the off-target effects of BCG, and causal models for long COVID and catheter-associated bloodstream infections. I currently conduct large-scale epidemiological studies using linked data to explore missed opportunities for HPV vaccination and to assess inequities in HIV treatment access, alongside community-based organisations including the National Association of People with HIV Australia (NAPWHA). Previously, I held an academic position in Medical Parasitology in Venezuela, where I conducted research that informed WHO guidelines on the public health control of strongyloidiasis. I am committed to advancing methodologies in epidemiological analysis to optimise vaccination strategies and disease prevention. I work in R daily, continuously expanding my skills; my favourite libraries belong to the core tidyverse.
E-mail
gperez@kirby.unsw.edu.au
  • Journal articles | 2024
    Chacón GP; Estcourt MJ; Totterdell J; Marsh JA; Perrett KP; Campbell DE; Wood N; Gold M; Waddington CS; Sullivan MO; McAlister S; Curtis N; Jones M; McIntyre PB; Holt PG; Richmond PC; Snelling T, 2024, 'Immunogenicity, reactogenicity, and IgE-mediated immune responses of a mixed whole-cell and acellular pertussis vaccine schedule in Australian infants: A randomised, double-blind, noninferiority trial', PLoS Medicine, 21, http://dx.doi.org/10.1371/journal.pmed.1004414
    Journal articles | 2024
    Messina NL; Germano S; McElroy R; Bonnici R; Grubor-Bauk B; Lynn DJ; McDonald E; Nicholson S; Perrett KP; Pittet LF; Rudraraju R; Stevens NE; Subbarao K; Curtis N; Davidson A; Gardiner K; Gwee A; Jamieson T; Morawakage T; Perlen S; Sastry A; Teo JW; Orsini F; Lee K; Moore C; Vidmar S; Ali R; Dunn R; Edler P; Gell G; Goodall C; Hall R; Krastev A; La N; McPhate N; Nguyen T; Ren J; Stevens L; Alamrousi A; Dang T; Hua J; Razmovska M; Reddiex S; Wang X; Anderson J; Azzopardi K; Bennett-Wood V; Czajko A; Mazarakis N; McCafferty C; Oppedisano F; Ortika B; Pell C; Spry L; Toh R; Velagapudi S; Vlahos A; Wee-Hee A; Ramos P; De La Cruz K; Gamage D; Karunanayake A; Mezzetti I; Ong B; Singh R; Sooriyarachchi E; Cain N; Brizuela R; Huang H; Abruzzo V; Bealing M; Bimboese P; Bowes K; Burrell E; Chan J; Cushnahan J; Elborough H; Elkington O; Fahey K; Fernandez M; Flynn C; Fowler S; Andrit MG; Gladanac B; Hammond C; Ma N; Macalister S; Milojevic E; Mojeed J; Nguyen J; O'Donnell L; Olivier N; Ooi I; Reynolds S; Shen L; Sherry B; Spotswood J; Wedderburn J; Younes A, 2024, 'Specific and off-target immune responses following COVID-19 vaccination with ChAdOx1-S and BNT162b2 vaccines—an exploratory sub-study of the BRACE trial', eBioMedicine, 103, http://dx.doi.org/10.1016/j.ebiom.2024.105100
    Journal articles | 2024
    Pittet LF; Messina NL; McDonald E; Orsini F; Barry S; Bonten M; Campbell J; Croda J; Croda MG; Dalcolmo M; Gardiner K; Gwee A; Jardim B; Lacerda MVG; Lucas M; Lynn DJ; Manning L; Perrett KP; Post JJ; Prat-Aymerich C; Richmond PC; Rocha JL; Rodriguez-Baño J; Warris A; Wood NJ; Davidson A; Curtis N; Jamieson T; Morawakage T; Perlen S; Sastry A; Teo JW; Lee K; Moore C; Vidmar S; Ali R; Dunn R; Edler P; Gell G; Goodall C; Hall R; Krastev A; La N; McPhate N; Nguyen T; Ren J; Stevens L; Alamrousi A; Bonnici R; Dang T; Germano S; Hua J; McElroy R; Razmovska M; Reddiex S; Wang X; Anderson J; Azzopardi K; Bennett-Wood V; Czajko A; Mazarakis N; McCafferty C; Oppedisano F; Ortika B; Pell C; Spry L; Toh R; Velagapudi S; Vlahos A; Wee-Hee A; Ramos P; De La Cruz K; Gamage D; Karunanayake A; Mezzetti I; Ong B; Singh R; Sooriyarachchi E; Nicholson S; Cain N; Brizuela R; Huang H; Abruzzo V; Bealing M; Bimboese P; Bowes K; Burrell E; Chan J; Cushnahan J; Elborough H; Elkington O; Fahey K; Fernandez M; Flynn C; Fowler S; Andrit MG; Gladanac B; Hammond C; Ma N, 2024, 'Bacille Calmette-Guérin vaccination to prevent febrile and respiratory illness in adults (BRACE): secondary outcomes of a randomised controlled phase 3 trial', eClinicalMedicine, 72, http://dx.doi.org/10.1016/j.eclinm.2024.102616
    Journal articles | 2024
    Pérez Chacón G; Fathima P; Jones M; Estcourt MJ; Gidding HF; Moore HC; Richmond PC; Snelling T, 2024, 'Infant Whole-Cell Versus Acellular Pertussis Vaccination in 1997 to 1999 and Risk of Childhood Hospitalization for Food-Induced Anaphylaxis: Linked Administrative Databases Cohort Study', Journal of Allergy and Clinical Immunology: In Practice, 12, pp. 670 - 680, http://dx.doi.org/10.1016/j.jaip.2023.12.048
    Journal articles | 2024
    Pérez Chacón G; Saha A; Phillips E; Guy R; Applegate TL; Causer L; Mcgregor S; Hengel B, 2024, 'Syphilis point-of-care tests: an Australian perspective', Microbiology Australia, 45, pp. 127 - 131, http://dx.doi.org/10.1071/MA24036
    Journal articles | 2023
    Chacón GP; Fathima P; Jones M; Estcourt MJ; Gidding HF; Moore HC; Richmond PC; Snelling T, 2023, 'Association between pertussis vaccination in infancy and childhood asthma: A population-based record linkage cohort study', PLoS ONE, 18, http://dx.doi.org/10.1371/journal.pone.0291483
    Journal articles | 2023
    Mascaro S; Wu Y; Woodberry O; Nyberg EP; Pearson R; Ramsay JA; Mace AO; Foley DA; Snelling TL; Nicholson AE; Semprini A; Martin A; McLean-Tooke A; Marais B; Tang B; McLeod C; Blyth CC; Lemoh C; Waddington C; Nolan D; Raby E; Perez G; Marks G; Denholm J; Pilgram L; Anstey N; Plebanski M; Boyd M; Borland ML; Maze M; John M; Middleton P; Craig S; Tong SYC; Benson S; Richards T, 2023, 'Modeling COVID-19 disease processes by remote elicitation of causal Bayesian networks from medical experts', BMC Medical Research Methodology, 23, http://dx.doi.org/10.1186/s12874-023-01856-1
    Journal articles | 2023
    Pittet LF; Moore CL; McDonald E; Barry S; Bonten M; Campbell J; Croda J; Dalcolmo M; Davidson A; Douglas MW; Gardiner K; Gwee A; Jardim B; Lacerda MVG; Lucas M; Lynn DJ; Manning L; de Oliveira RD; Perrett KP; Prat-Aymerich C; Richmond PC; Rocha JL; Rodriguez-Baño J; Warris A; Wood NJ; Messina NL; Curtis N; Jamieson T; Morawakage T; Perlen S; Sastry A; Teo JW; Orsini F; Lee K; Vidmar S; Ali R; Dunn R; Edler P; Gell G; Goodall C; Hall R; Krastev A; La N; McPhate N; Nguyen T; Ren J; Stevens L; Alamrousi A; Bonnici R; Dang T; Germano S; Hua J; McElroy R; Razmovska M; Reddiex S; Wang X; Anderson J; Azzopardi K; Bennett-Wood V; Czajko A; Mazarakis N; McCafferty C; Oppedisano F; Ortika B; Pell C; Spry L; Toh R; Velagapudi S; Vlahos A; Wee-Hee A; Ramos P; De La Cruz K; Gamage D; Karunanayake A; Mezzetti I; Ong B; Singh R; Sooriyarachchi E; Nicholson S; Cain N; Brizuela R; Huang H; Abruzzo V; Bealing M; Bimboese P; Bowes K; Burrell E; Chan J; Cushnahan J; Elborough H; Elkington O; Fahey K; Fernandez M; Flynn C; Fowler S; Andrit MG; Gladanac B; Hammond C, 2023, 'Bacillus Calmette-Guérin vaccination for protection against recurrent herpes labialis: a nested randomised controlled trial', eClinicalMedicine, 64, http://dx.doi.org/10.1016/j.eclinm.2023.102203
    Journal articles | 2022
    Messina NL; Germano S; McElroy R; Rudraraju R; Bonnici R; Pittet LF; Neeland MR; Nicholson S; Subbarao K; Curtis N; Baena AS; Teo JW; de Lima GT; Abreu C; Abruzzo V; Addlem L; Agius S; Barbosa AAR; Alamrousi A; da Silva dos Santos AA; Al-Hindawi Y; Silveira SAD; da Cruz LA; Anderson J; Nelly A; Anthony C; dos Reis Pereira AASDA; de las Revillas Almajano FA; Arnold A; Arrowsmith B; Azzopardi K; Marti CB; Bahaduri T; Bannister S; Barney S; Barrera L; Barriocanal A; Barros D; Barry S; Bartlett A; Batista L; Muranaka S; Baulman T; Bealing M; Beardsley J; Gutierrez ABM; Bell J; Benson S; Rym B; Bennett-Wood V; Bergant N; Barbosa FB; Bijllaardt W; Bimboese P; de Andrade CB; Blake S; Blauwendraat K; Boersma W; Garcia PB; Bonten M; Boon A; Bourke A; Bowes K; Brasil L; Brophy C; Botten R; Buchanan S; Bucholc J; Burns A; Burrell E; Bustos N; Byrne B; Byrne A; Calbo E; Montes JC; Camesella B; Campbell J; Cangas A; Carlin J; Roque MC; Diogo RCP; Carvalho E; Casas I; Castro E; Castro R; Catterick H; Escobar RCD; Chan J; Cheah J; Chern TY; Chengodu T; Ciaverella M; Clark S; Espindola MAC; Cobbledick A; Colaco C; Collopy S; Comella P; Corbett M; Castro GCE; Palasanthiran P; McMullan B; Perez Chacon G, 2022, 'Off-target effects of bacillus Calmette–Guérin vaccination on immune responses to SARS-CoV-2: implications for protection against severe COVID-19', Clinical and Translational Immunology, 11, pp. e1387, http://dx.doi.org/10.1002/cti2.1387
    Journal articles | 2022
    Totterdell JA; Chacon GP; Estcourt MJ; Jones M; Richmond P; Snelling TL; Marsh JA, 2022, 'Statistical analysis plan for the OPTIMUM study: optimising immunisation using mixed schedules, an adaptive randomised controlled trial of a mixed whole-cell/acellular pertussis vaccine schedule', Trials, 23, http://dx.doi.org/10.1186/s13063-021-05874-6
    Journal articles | 2021
    Chacón GP; Fathima P; Jones M; Barnes R; Richmond PC; Gidding HF; Moore HC; Snelling TL, 2021, 'Pertussis immunisation in infancy and atopic outcomes: A protocol for a population-based cohort study using linked administrative data', PLoS ONE, 16, http://dx.doi.org/10.1371/journal.pone.0260388
    Journal articles | 2021
    Perez Chacon G; Ramsay J; Brennan-Jones CG; Estcourt MJ; Richmond P; Holt P; Snelling T, 2021, 'Whole-cell pertussis vaccine in early infancy for the prevention of allergy in children', Cochrane Database of Systematic Reviews, 2021, http://dx.doi.org/10.1002/14651858.CD013682.pub2
    Journal articles | 2021
    Pittet LF; Messina NL; Gardiner K; Orsini F; Abruzzo V; Bannister S; Bonten M; Campbell JL; Croda J; Dalcolmo M; Elia S; Germano S; Goodall C; Gwee A; Jamieson T; Jardim B; Kollmann TR; Lacerda MVG; Lee KJ; Legge D; Lucas M; Lynn DJ; McDonald E; Manning L; Munns CF; Perrett KP; Prat Aymerich C; Richmond P; Shann F; Sudbury E; Villanueva P; Wood NJ; Lieschke K; Subbarao K; Davidson A; Curtis N; Abreu C; Addlem L; Agius S; Barbosa AAR; Alamrousi A; da Silva dos Santos AA; Al-Hindawi Y; Da Silveira SA; da Cruz LA; Anderson J; Anthony C; de Almeida dos Reis Pereira AAS; de las Revillas Almajano FA; Arnold A; Arrowsmith B; Azzopardi K; Marti CB; Bahaduri T; Barney S; Barrera L; Barriocanal A; Barros D; Bartlett A; Muranaka LBS; Baulman T; Bealing M; Beardsley J; Gutierrez ABM; Bell J; Bennett-Wood V; Bergant N; Barbosa FB; Bijllaardt W; Bimboese P; de Andrade CB; Blauwendraat K; Boersma W; Garcia PB; Bonnici R; Boon A; Bourke A; Bowes K; Brasil L; Brophy C; Buchanan S; Bucholc J; Burns A; Burrell E; Bustos N; Byrne B; Byrne A; Calbo E; Montes JC; Camesella B; Campbell J; Cangas A; Carlin J; Roque MC; Diogo RCP; Carvalho E; Casas I; Castro E; Castro R; Catterick H, 2021, 'BCG vaccination to reduce the impact of COVID-19 in healthcare workers: Protocol for a randomised controlled trial (BRACE trial)', BMJ Open, 11, http://dx.doi.org/10.1136/bmjopen-2021-052101
    Journal articles | 2020
    Perez Chacon G; Estcourt M; Ramsay J; Brennan-Jones CG; Richmond P; Holt P; Snelling T, 2020, 'Whole-cell pertussis vaccine in early infancy for the prevention of allergy', Cochrane Database of Systematic Reviews, 2020, http://dx.doi.org/10.1002/14651858.CD013682
    Journal articles | 2020
    Perez Chacon G; Estcourt MJ; Totterdell J; Campbell DE; Perrett KP; Marsh JA; Richmond PC; Wood N; Gold MS; Holt PG; Waddington CS; Snelling TL, 2020, 'OPTIMUM study protocol: An adaptive randomised controlled trial of a mixed whole-cell/acellular pertussis vaccine schedule', BMJ Open, 10, http://dx.doi.org/10.1136/bmjopen-2020-042838
    Journal articles | 2017
    Pocaterra LA; Ferrara G; Peñaranda R; Rojas E; Pérez-Chacón G; Hernán A; Certad G; Goldstein C; Núñez L, 2017, 'Improved detection of strongyloides stercoralis in modified agar plate cultures', American Journal of Tropical Medicine and Hygiene, 96, pp. 863 - 865, http://dx.doi.org/10.4269/ajtmh.16-0414
    Journal articles | 2017
    Pérez-Chacón G; Pocaterra LA; Rojas E; Hernán A; Jiménez JC; Núñez L, 2017, 'Case report: Coinfection with hymenolepis nana, hymenolepis diminuta, giardia intestinalis, and human immunodeficiency virus: A case report with complex immunologic interactions', American Journal of Tropical Medicine and Hygiene, 96, pp. 1094 - 1096, http://dx.doi.org/10.4269/ajtmh.16-0413
    Journal articles | 2017
    de Noya BA; Pérez-Chacón G; Díaz-Bello Z; Dickson S; Muñoz-Calderón A; Hernández C; Pérez Y; Mauriello L; Moronta E, 2017, 'Description of an oral chagas disease outbreak in Venezuela, including a vertically transmitted case', Memorias do Instituto Oswaldo Cruz, 112, pp. 569 - 571, http://dx.doi.org/10.1590/0074-02760170009
    Journal articles | 2016
    Wagner C; Reyes-Batlle M; Hernán A; Rojas E; Pérez G; López-Arencibia A; Sifaoui I; Martínez-Carretero E; Piñero JE; Valladares B; Lorenzo-Morales J, 2016, 'High occurrence of acanthamoeba genotype T4 in soil sources from Bolívar State, Venezuela', Acta Parasitologica, 61, pp. 466 - 470, http://dx.doi.org/10.1515/ap-2016-0063
  • Preprints | 2025
    Pérez Chacón G; McAlister S; Totterdell J; Estcourt MJ; Marsh JA; Jones M; Perrett KP; Campbell DE; Wood N; Gold M; Waddington CS; O’Sullivan M; Curtis N; Wadia U; McIntyre PB; Holt PG; Snelling T; Richmond PC, 2025, Immunogenicity of co-administered vaccine antigens with whole-cell or acellular pertussis vaccines in infancy: a randomised controlled trial, http://dx.doi.org/10.1101/2025.02.16.25321528
    Preprints | 2024
    Pérez Chacón G; Mascaro S; Estcourt MJ; Phetsouphanh C; Nicholson AE; Snelling T; Wu Y, 2024, Modelling long COVID using Bayesian networks, http://dx.doi.org/10.1101/2024.03.04.24303715
    Preprints | 2023
    Pérez Chacón G; Estcourt MJ; Totterdell J; Marsh JA; Perrett KP; Campbell DE; Wood N; Gold M; Waddington CS; Sullivan MO; McAlister S; Curtis N; Jones M; McIntyre PB; Holt PG; Richmond PC; Snelling T, 2023, Immunogenicity, reactogenicity, and IgE-mediated immune responses of a mixed whole-cell and acellular pertussis vaccine schedule in Australian infants: a randomised, double-blind, non-inferiority trial, http://dx.doi.org/10.1101/2023.12.20.23300336

  1. Can one vaccine help another? Enhancing responses to the 13-valent pneumococcal conjugate vaccine in Western Australian infants (CIB). WA Child Research Fund (WACRF, 2022).
  2. Pertussis immunisation and atopic outcomes (CIA). Wesfarmers Centre of Vaccines and Infectious Diseases Seed Funding Grant (2018).
  3. Forrest Research Foundation Supplementary Scholarship (2018).
  4.  Australian Department of Education and Training – Endeavour PhD Scholarship (2018).
  5. Wesfarmers Centre of Vaccines and Infectious Diseases Top-Up Scholarship (2018).

 

  1. Chancellor’s Commendation, PhD in Public Health (passed with no corrections, June 2023). 
  2. Inaugural recipient - Stan & Jean Perron Post-PhD Career Launching Award (2022).
  3. Hugo Lumbreras Award - Top of the class, Diploma in Tropical Medicine and Hygiene, Cayetano Heredia University (Lima, Peru) & University of Alabama (Birmingham), 2016.

Vaccine research to help address ‘tsunami of food allergies and eczema’